Drying machine



.April 4"1"'5, 1924.

G. A. CARLSON DRYING MACHINE Filed Dec 17. 1921 Y WUeWT jf arif,

Patented pr. 15, 1924.

' 1,4905@ PATENT orifice.

GUSTAV A. CARLSON, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE BOYE NEEDLE COMPANY, F CHICAGO, ILLINOIS,

A CORPORATION 0F ILLINOIS. 1

DRYING MACHINE.

y drying small metal articles.

The primary object is to provide a simple and convenient apparatus forthe purpose indicated.

The improved apparatus may be usefully employed, for example, in dryingcrochet needles, or crochet needle blanks which have been subjected tostamping or swaging operations in the manufacture of the needles. Duringsuch manufacture, the articles be `f' come more or less coated with oilor grease;

and to cleanse them, they are immersed in a pickling bath. After beingcleansed in a bath, a drying operation is desirable. Heretofore it hasbeen the practice to effect the drying of such articles in a rotarytumbling barrel, .or drum, containing saw-dust. Such an operation ismore or less slow and expensive, necessitating a further cleaning orwiping operation.

In the use of the improved apparatus described, the crochet needles, orthe partially completed needles, as the case may be, are taken from thebath and fed into one' end of an inclined rotary tube which is heated bymeans of steam. The articles are discharged at the lower end of the tubein a dry, clean, condition.

The invention is shown in its preferred embodiment in the accompanyingdrawing, in which:

Figure 1 represents a plan view of the improved apparatus; Fig. 2, abroken elevational view of the same; and F ig. 3, a broken longitudinalsectional View of the same on an enlarged scale.

In the construction illustrated, A represents a bed or table; and B, arotary dryer mounted thereon. f

The dryer B comprises an inner tube 1, and an outer tube or jacket 2.Between these tubes is an annular space or chamber 3 whose ends areclosed by means of rings 4, which are in the form of annular plugsinserted between the end portions of the tubes. The dryer B isjournalled in bear- Seral No. 523,148.

ings C and C which are su )orted on thc e Pl table A. Each of thesebearings comprises a cylindrical 'member' 5,r supported on a standard 6,mounted yon the table. The bore of the cylindrical member 5 is onlyslightly larger than the diameter of the outer tube 2 at the centralportion ot' the bearing, as indicated at 7. A thin cylindrical bushingor sleeve 8 is interposed between the member -and the outer tube 2. Thebore of the member 5 is enlarged atthe end portions, as indicated at 9,and these enlarged oortions of the bore receive the packing 9a and stungglands 10.

A steam inlet pipe 11 is connected with the upper side of the bearing C,and connects through a passage 11a with the annular chamber 3.

The construction at the bearing C is the same, and the parts aresimilarly lettered. Here, however, an exhaust pipe 12 is connected withthe lower side of the bea-ring, and the heating fluid passes from thiseX- haust pipe through the passage 12 communicating with the annularchamber 3. No inlet pipe is employed at the bearing C', of course.

The outer tube 2 is equipped at its central or intermediate portion witha bevel gear 1.3 which meshes with a bevel pinion 14 on a driving shaft15, which is equipped with a pulley 16. This enables the rotary dryer Bto be driven by means of a belt applied to the pulley 16.

The operation of the device is as follows:

Steam is admitted to the annular chamber 3, through the ypipe 11, and isexhausted through the pipe 12. The rotary dryer B is driven through themedium of the pulley 16, and the gears actuated thereby. rlhe articlesto be dried are fed into the dryer at the upper end, which is designated17, the dryer being set somewhat upon an incline, so that as the dryerrotates the articles being dried will gravitate slowly through the innertube. The articles will be discharged at the lower end of the tube,where an inclined discharge chute 18 may be provided, if desired.

For drying small articles of the character referred to, the inner tubemay suitably be of a diameter of about 6 inches, and the length of thedryer may be 10 or 15 feet.

The outer tube 2 is provided with a perforationv 11b which registerswith the perfor-ation l1a of the bearing C at each revolution of therotary dryer. If desired7 a series of such perforations 1lb may beprovided, as indicated in Fig. 3. The sleeve 8 may be made to rotatewith the dryer, if desired; or it may remain stationery. It' it be madeto rotate, it is provided With a series of perforutions registering withthe perforations 1lb of the tube 2. In a similar inenner, the outer tube2 is provided with perforations 12b, and the reinforcing sleeve whichcorresponds with the slee-ve 8 is provided with registeringperforations.

The foregoing detailed description has been given for elearness ofunderstanding only and no unnecessary limitations should be understoodtherefrom, but the appended claims should be construed as broadly aspermissible in view ot the prior art.

lhat l regard :is new, und desire to secure by Letters Patent, is:

l. In apparatus or". the character set forth the Combination of aninclined, jueketedA tube, bearings in which the jacket of said tube isjournalled, inlet and outlet pipes connecting with said bearings andcoininunieating through seid bearings With the interior or' thejeelieted space about said tube, and means for rotating the tube.

2. In apparatus of the character set forth the Combina-tion of a bed, apair of bearings mounted thereon, said bearings being equipped et theirends with stuiing glands, a rotary inclined dryer journalled in saidbearings and comprising an inner tube and an outer tube having anannular chamber between theni, the ends of seid annular chamber beingclosed, an inlet pipe Connecting with one of said bearings andcommunicating therethrough with said annular chamber, un outlet pipeconnecting with the other of seid bearings and communicatingtherethrough with said annular chamber, a gear mounted on the outertube, and means for actuating said gear.

' GUSTAV A. CARLSON.

